In 1987, the Montreal Protocol was signed by 199 countries to protect the ozone layer. A big hole in the Arctic was caused due to increased global warming. The rise in chlorofluorocarbons (CFCs) led to this depletion in the ozone layer. The Ozone layer protects us from the harmful rays of the sun, which can cause skin cancer. The good news is a recent study by the University of Colorado Boulder...
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